A comparison of the diagnostic accuracy of MARS MRI and ultrasound of the painful metal-on-metal hip arthroplasty

Title: A comparison of the diagnostic accuracy of MARS MRI and ultrasound of the painful metal-on-metal hip arthroplasty
Author(s): Siddiqui, IA
Sabah, SA
Satchithananda, K
Lim, AK
Cro, S
Henckel, J
Skinner, JA
Hart, AJ
Item Type: Journal Article
Abstract: Background and purpose — Metal artifact reduction sequence (MARS) MRI and ultrasound scanning (USS) can both be used to detect pseudotumors, abductor muscle atrophy, and tendinous pathology in patients with painful metal-on-metal (MOM) hip arthroplasty. We wanted to determine the diagnostic test characteristics of USS using MARS MRI as a reference for detection of pseudotumors and muscle atrophy. Patients and methods — We performed a prospective cohort study to compare MARS MRI and USS findings in 19 consecutive patients with unilateral MOM hips. Protocolized USS was performed by consultant musculoskeletal radiologists who were blinded regarding clinical details. Reports were independently compared with MARS MRI, the imaging gold standard, to calculate predictive values. Results — The prevalence of pseudotumors on MARS MRI was 68% (95% CI: 43–87) and on USS it was 53% (CI: 29–76). The sensitivity of USS in detecting pseudotumors was 69% (CI 39–91) and the specificity was 83% (CI: 36–97). The sensitivity of detection of abductor muscle atrophy was 47% (CI: 24–71). In addition, joint effusion was detected in 10 cases by USS and none were seen by MARS MRI.
Publication Date: 3-Apr-2014
Date of Acceptance: 8-Feb-2014
URI: http://hdl.handle.net/10044/1/51376
DOI: https://dx.doi.org/10.3109/17453674.2014.908345
ISSN: 1745-3674
Publisher: Informa Healthcare
Start Page: 375
End Page: 382
Journal / Book Title: Acta Orthopaedica
Volume: 85
Issue: 4
Copyright Statement: © Nordic Orthopaedic Federation This is an open-access article distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the source is credited.
Copyright Statement: © Nordic Orthopaedic Federation This is an open-access article distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the source is credited.
Keywords: Science & Technology
Life Sciences & Biomedicine
Orthopedics
ORTHOPEDICS
PSEUDOTUMORS
REPLACEMENTS
BEARINGS
Aged
Arthralgia
Arthroplasty, Replacement, Hip
Artifacts
Female
Femur Head Necrosis
Granuloma, Plasma Cell
Humans
Magnetic Resonance Imaging
Male
Metals
Middle Aged
Muscular Atrophy
Osteoarthritis, Hip
Postoperative Complications
Prospective Studies
Reoperation
Reproducibility of Results
Sensitivity and Specificity
Ultrasonography
Humans
Femur Head Necrosis
Arthralgia
Osteoarthritis, Hip
Muscular Atrophy
Granuloma, Plasma Cell
Postoperative Complications
Metals
Magnetic Resonance Imaging
Ultrasonography
Arthroplasty, Replacement, Hip
Reoperation
Artifacts
Sensitivity and Specificity
Prospective Studies
Reproducibility of Results
Aged
Middle Aged
Female
Male
Science & Technology
Life Sciences & Biomedicine
Orthopedics
ORTHOPEDICS
PSEUDOTUMORS
REPLACEMENTS
BEARINGS
0903 Biomedical Engineering
1103 Clinical Sciences
Orthopedics
Publication Status: Published
Appears in Collections:Faculty of Medicine
Epidemiology, Public Health and Primary Care



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